I cannot log on to windows 2000 although I did not change the password

I have windows 2000 professional- It is a stand alone computer- I tried to change network configurations to get it to recognize my home network- after trying to do this and not succeding I turned the computer off-when I restarted it the computer will no longer recognize my password- I CANNOT LOG ON TO WINDOWS NOW- what did I do? What can I do/

Hi
Do you ever recall setting up an administrator account and password when you first installed? If you've set it to be a member of a workgroup this can happen. You need to try logon with a valid local account. Try logon as username "Administrator" and blank password, or use the password you created at install if you can remember setting one.

If this doesn't get you in then you can change the Administrator password, with this utility below. Change it to blank and you should be able to get in ok,
Offline NT Password Editorhttp://home.eunet.no/~pnordahl/ntpasswd/